Urinalysis: Specimen Preservation

Question 1

When should you examine a urine sample?

Answer 1

as soon as possible to eliminate effects of chemical and cellular change

Question 2

What should you do if you don’t examine the sample within hour? (2)

Answer 2

1. refrigerate

2. chemically preserve

Question 3

How long can a urine sample be refrigerated without affecting results?

Answer 3

6 hours

Question 4

What should you do to a refrigerated sample before testing specific gravity?

Answer 4

warm it up to room temp

Question 5

What are the changes that can happen to urine samples that stand at room temp?

1. RBC
2. pH
3. Bacteria
4. Sample Turbidity
5. crystals
6. casts
7. glucose

Answer 5

1. RBC - decrease
2. pH - increases
3. Bacteria - increases
4. Sample Turbidity - increases
5. Crystals - increase
6. Casts- decrease
7. Glucose - decreases